64 
Aug. F. Foerste 
ertella insculpta horizon and a coral horizon, at least 40 feet 
farther up. At the Hehertella insculpta horizon, Catazyga headi 
occurs locally. Strophomena sulcata ranges from immediately 
above the Hehertella insculpta horizon upward for a distance of 
about 20 feet. Protarea richmondensis, Columnaria alveolata, 
Calapoecia huronensis, Streptelasma canadensis, and Rhyncho- 
trema perlamellosa begin their range at the Hehertella insculpta 
horizon and continue their range at various intervals to the 
coral horizon already mentioned. Some of these species are 
found for a considerable distance beyond this coral horizon. The 
abundant species of Strophomena, here under discussion, ranges 
from the Hehertella insculpta horizon almost up to the coral bed. 
Cyclonema hilix and a small form of Plectamhonites sericea occur 
in the lower half of this interval, and Platystrophia clarksvillensis 
also occurs at various levels. Rhomhotrypa quadrata ranges from 
the Hehertella insculpta horizon upward for about 6 feet. Zygospira 
kentuckiensis ranges from about 17 feet below the coral horizon 
to layers overlying the coral bed. The latter is characterized 
by the great numbers of Columnaria alveolata and Calapoecia 
huronensis present. Specimens of Tetradium and of Stromato- 
cerium occur. The chief feature of this coral horizon is not the 
presence of any characteristic species, not found above or below, 
but the abundance of Columnaria and Calapoecia, species which 
at other levels, especially at lower levels, occur only as isolated 
specimens. 
In general, this section between the Hehertella insculpta 
horizon and the coral bed, 40, 50 or 60 feet higher up, is very 
suggestive of the upper or Blanchester division of the Waynes- 
ville member of the Richmond, while the overlying beds, con- 
taining Beatricea undulata, may be compared with the Saluda 
of Indiana and Kentucky. The most conspicuous feature of 
the lower division of the Richmond, on Alanitoulin, is the absence 
of Leptaena richmondensis, a fossil extremely abundant in the 
Blanchester division of the Waynesville member. On the other 
hand, the presence of isolated specimens resembling Stropho- 
mena neglecta and Strophomena nutans is highly suggestive. 
The most striking feature of the section overlying the coral hori- 
zon is the absence of Dinorthis suhquadrata and of Strophomena 
vetusta. It should be remembered, however, that the latter 
species were driven out of the Indiana and Kentucky Richmond, 
